Polarity effect and its inversion in nanosecond-pulse breakdown of dense gases

M. I. Lomaev, V. F. Tarasenko, D. V. Beloplotov, T. Shao, C. Zhang

Результат исследований: Материалы для книги/типы отчетовГлава

Аннотация

The breakdown of gas gaps in an inhomogeneous electric field at subnanosecond and nanosecond voltage pulse rise times are studied, and the famous polarity effect in pointto- plane gaps is investigated. It is shown that, the inversion of the polarity effect takes place not only in electronegative gases such as SF6, but also occurs in electropositive nitrogen and in air. It is found that with a voltage pulse rise time of ~0.5 ns, the inversion of the polarity effect occurs at SF6 and SF6-N2 pressures of 0.25 MPa and lower, at air pressure up to 0.3 MPa and with a voltage pulse rise time of 15 ns, at a SF6 pressure lower than 0.12 MPa. The inversion of the polarity effect is related to a delay of electron emission from the plane cathode on arrival of the ionization wave front anode to the cathode. In addition, both the inverted and the ordinary polarity effects were not observed at the breakdown of nitrogen at pressures of 0.4 and 0.7 MPa.

Язык оригиналаАнглийский
Название основной публикацииGeneration of Runaway Electron Beams and X-Rays in High Pressure Gases, Volume 2
Подзаголовок основной публикацииProcesses and Applications
ИздательNova Science Publishers, Inc.
Страницы233-255
Число страниц23
ISBN (электронное издание)9781634858489
ISBN (печатное издание)9781634858342
СостояниеОпубликовано - 1 янв 2016
Опубликовано для внешнего пользованияДа

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Lomaev, M. I., Tarasenko, V. F., Beloplotov, D. V., Shao, T., & Zhang, C. (2016). Polarity effect and its inversion in nanosecond-pulse breakdown of dense gases. В Generation of Runaway Electron Beams and X-Rays in High Pressure Gases, Volume 2: Processes and Applications (стр. 233-255). Nova Science Publishers, Inc..